In an electric power plant ,personnel monitor the O2 content of the boiler feed water to prevent corrosion of the boiler tubes . in boiler tubes there is iron metal exposed to water and gases ,increasing chances of corrosion .
Fe metal particularly faster to corrodes when there is supply of oxygen available .as the steam is a gaseous material containing water molecules , so there is a high chances of availability of oxygen than in hot and cold water . because the water even if it is hot and cold it does not have sufficient amount of oxygen than the outer environment where steam is present .
Hence , Fe corrodes faster in steam than in hot water than in cold water .
Corrosion is a process in which there is transformation of pure metal into damaged metal due to the expose to the outer environment and in contact with water and oxygen .
it is a natural phenomena which have negative impact on the metal body.
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